US3434826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of noble metals which are volatilized during catalytic reactions
Assignee: Evonik Operations GmbH
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Filing: 1965-10-04
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Granted: 1969-03-25
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Hermann Holzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/02; C22B11/021; C22B11/026; C22B11/028; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/26; C01B21/267; C22C; C22C5/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2302725A
Cited
US2648393A
Cited
US2730189A
Cited
US2747679A
Cited
US2920953A
Cited
US3303020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |